Shoe-sole-stitching mechanism.



H. MIGHBLSEN.V SHOE SOLE STITUHING MBGHANISM.

APPLIUATION FILED N`()V.15,1912.v

Patented Jan. 6, 1914.

UNITED STATES HANS MICHELSEN, OF MINNEAPOLIS, MINNESOTA.

SHOE-SOLESTITCHING MECHANISIVI.

Speccation of Letters Patent.

Patented Jan. 6, 1914.

Application led November 15, 1912. Serial No. 731,639.

To all whom t may concern Be it known that I, HANS MIcrmLsnN, a citizen of the United States, residing at Minneapolis, in the county of Hennepin and State of Minnesota, have invented certain new and useful Improvements in Shoe-Sole- Stitching Mechanism; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Particularly,` this invention relates to mechanism for stitching shoe soles having what is known as flat or blind channels, and

the invention is directed especiallyT to an improved presser foot and attachments therefor, whereby the channel will be automatically opened, just in advance of applying the stitches thereto, glue or cement will be applied in the open channel, and thereafter the flap of the channel will be pressed down upon the stitches and upon the applied glue or cement.

As an important feature of this invention, the presser foot is pivotally connected to its support so that it may oscillate and thereby adapt itself to a shoe sole or similar piece that is being stitched, regardless of whether the said sole lies perfectly flat or is somewhat tilted; and in this respect, the present invention is in the nature of an improve'- ment on the presser footand sole stitching mechanism disclosed and claimed in my prior Patents, 957,697 of date, May 10th, 1910, m1989511, @1 date, April 11, 1911.

Generally stated, the invention consists of the novel devices and combinations of devices hereinafter described and defined in the claims.

In the accompanying drawings which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings, Figure 1 is a view in side elevation with some parts broken away showing parts of the sole stitching mechanism and including the improved presser foot and attachments thereto for accomplishing the several functions above noted; Fig. 2 is a front elevation of the presser foot and support therefor; Fig. 3 is a plan view of the parts shown in Fig. 2, some parts being sectioned; Fig. 4 is a detail in transverse vertical section taken on the line 904 :c4 on Fig. 8; Fig. 5 is a plan view ofthe presser` foot, some parts being sectioned; and Fig- 6 is a plan view of the presser foot and a portion of its support and showing also the action thereof on the channel of the shoe sole.

The character a indicates the shoe sole which is formed with the customary flat or iblind channel c1 having a thin flap a2 cut inward from the edge of the sole, preferably roughing out machine. The stitching mechanism is also of the well lmown conlstruction and of the parts thereof, it is only ,desirable for the purposes of this case to `particularly note the oscillatory needleV 1, oscillatory awl 2, the work support 3, and a support 4 for the presser foot. v

In the application of my improved presser foot, the support 4 therefor is preferably lprovided with an adjustable bracket or eX- gtension 5 rigidly secured thereto by machine screws 6. The improved presser foot 7, in ,accordance with this invention, is connected i,to a` sleeve-like end of the bracket 5 with {freedom for limited oscillatory movements Ein a vertical plane transversely intersecting Qthe stitching line, by means of a long majchine screw 8, best shown in Figs. 4 and 5. This presser foot 7 is provided with a chanjnel opening plow or flap lifter 9, with a hook-like flap closing toe 10, and with a hook-like so-called flap detaining linger 11, {.which parts operate as hereinafter more rfully described. The numeral 12 indicates the delivery section of a cement or glue supliply tube the extended portion 13 of which lis provided with a horizontal stop cock 14, and at its upper end is connected to a cement or glue supplying tank 15. The said ftube section 12 is provided with a projecting farm 16 which is rigidly clamped between lthe bracket 5 and the presser foot support A4, Aiso that the lower end of the said tube section 12 stands in position to properly deliver j-glue or cement into the open channel of the shoe sole at a point between the plow 9 and lflap closing toe 10. Inasmuch as the cement or glue contained in the tank l5 would not flow readily under the action of gravity alone, the said tank is preferably closed and lsubjected to the proper air pressure by suit- ;able air supplying means, not shown.

The operation is substantially as follows: The plow 9 is inserted into the channel in such manner that it will raise the flap a1 thereof, and the flap closing toe 10 will 'then ieXtend across the said flap a1 at the rear of the needle and at the rear of the delivery end of the tube 12, in such manner vthat as the shoe sole is forced rearward, after it .in the customary way, by the well known l has been stitched, and the cement applied in the channel, it will press the said flap down into a closed position over the formed stitches and onto the interposed cement. It is not, however, desirable that the flap, when thus closed, be pressed down iat with the surface of the sole, because if this be immediately done before the cement or glue has had a chance to partly harden, too much of the cement will be forced out of the channel. Hence, that portion of the under side of the said toe 10 which engages the said flap is slightly raised at 10t (see F ig. 2), above the plane of the bottom of the presser foot. It may be here stated that after the cement is hardened, the liap thus closed will be pressed flat and closed with the sole by the ordinary well known leveling device The so-called detaining finger 11 engages the under surface of the opened channel flap a2, as best shown in Fig. G, and prevents closing of the said flap until after the stitches have been properly formed and the cement or glue properly applied in the channel al. Of course, the needle works in the space at the rear of the plow 9 and in front of the toe l0 and finger 11. By adjustments of the foot supporting brackets 5, the said presser foot may be properly set laterally with respect t-o the needle, and for the proper projection of the plow and the toe 10 and linger 1l to one side of the needle, as required in channels of different width.

Hitherto, in doing the above class of work, it has been customary to first open the flaps of the channels by hand, second to apply the glue or cement in the channel after the sole has been stitched, by hand operations, and third, by another hand operation to close the flap of the channels. By the use of my improved presser foot, these three hand operations are eliminated and all of the said operations are automatically preformed in the process of stitching. Obviously, this greatly reduces labor and cost of the work above described.

rThe pivoted presser foot will, as is evident, hold its proper engagement with the shoe sole and channel regardless of whether the shoe sole be held horizontal or considerably tilted from a horizontal position; and this function is highly important not only in the particular arrangement herein described and illustrated in the drawings, but also in various other forms of the presser foot, such, for instance, as illustrated in my said prior patents above identified.

Vilhat 1 claim is:

1. In a stitching mechanism of the kind described, a presser foot having a relatively fixed work engaging body portion and provided with a heel or end section mounted for lateral pivotal movements.

2. In a stitching mechanism of the kind described, a presser foot provided with a relatively liXed laterally projecting furrow opening plow and having a flap closing toe at the rear thereof, mounted for transverse pivotal movements.

3. 1n a stitching mechanism of the kind described, a presser foot having a furrow opening plow projecting laterally therefrom, said plow having an oblique upper surface adapted to raise the flap of a previously formed channel, and the said foot having also a flap closing toe at the rear thereof, the needle of said stitching mechanism being arranged to work between said plow and toe.

4. In a stitching mechanism of the kind described, a presser foot provided with a laterally projecting furrow opening plow and with a flap closing toe at the rear thereof, and means for supplying cement in the channel of the work being sewed, while the stitching mechanism is in action, comprising a tube arranged to deliver cement into the channel at the rear of said plow and in front of said toe.

5. In a stitching mechanism of the kind described, a presser foot provided with a laterally projecting furrow opening plow and with a flap closing toe at the rear thereof, and means for supplying cement in the channel of the work being sewed, while the stitching mechanism is in action, comprising a tube arranged to deliver cement into the channel at the rear of said plow and in front of said toe, and a flap det-aining finger on said shoe operative to hold the flap open at the rear of said plow and just in front of said toe.

6. 1n a stitching mechanism of the kind described, a presser foot provided with a flap closing toe and with a flap detaining finger, the latter being engageable with the flap just in front of said toe and serving to hold the flap in an open position while the stitches are being applied.

7. In a stitching mechanism of the kind described, a presserl foot having a laterally projecting furrow opening plow, a laterally projecting flap closing toe at the rear of 'said plow and a iiap detaining linger arranged to engage a channel flap just in front of said toe.

In testimony whereof I aflix my signature in presence of two witnesses.

HANS MICHELSEN.

Witnesses:

F. D. MERCHANT, HARRY D. KILGORE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

